Support for pyrometers.



G. www. SUPPORT FOR PY'ROMETERS. APPLICATION FILED AUGII. Il.

3 SHEETS-SHEET I- l y l, IIIIIIII' Il l.

--------- mmm. n *1 G. DAVEY.

surrom ma mommas. APPLICATION man Aue.n.1s\5.

` 1,259,372. Patented Mar. 12, 19l8.

3 SHEETS-SHEET 2.

G. DAVEY.

SUPPORT FOR PYROMETERS. APPLICATION FILED AuG.II. 1915.

1,259,372. Patented Mar. 12, 1918.

a SHEETS-SHEET a.

3 wom/vtm GEORGE nAvEY, or BROOKLYN, NEW YORK.

l "To all w71 om t may concern:

Be itknown that I, GEORGE DAVEY, a subject` of the King of Great Britain, and a i resident` of the borough of Brooklyn, in` the ,-ments `relating to pyrometers,

county of Kings andkState` of New York,

`have invented certain new and useful Improvements Relating to Supports for Pyrometers, of which the following is a speciication. Y

My invention one of the objects of which 1s toenable the sensitive end .j of the pyrometer, comprising the there' Y mo-oouple, to -be conveniently supported by an attendant or observer standing at a dis- .j tance vfrom a Crucible of` molten `metal or the; like, in which saidsensitive end j `be immersed, the` sensitive end being 1 `1n such manner asto guardagainst break- 1 fra may held age ofthe` protective tube of comparatively gile refractory` material `by which the couple is surrounded. Another object is to guard` against error inv the readingby the provision of` simple cooling the cold functions ofthe thermocouple.

` InIthe accompanying drawings illustrating` the` invention in fits preferred embodiment:

paratus, the

.j Figure 1 is. a perspective view of the apintermediate portion j of the "z sensitive end of the pyrometer being broken Way? i Fig.

` therear part of the handle 1 Fig. 8 is-a e anyenlarged scale; [so

1 handle. l

away for economy of space;

. Fig. '2 is a vertical section taken. in the plane ofthe handle, the latter being broken is4 a horizontal section on the line 3-1-3 of Fig.2';l z f Fig. 4l is a horizontal section on the line of Fig. 2; Fig.` 5 is a longitudinal section through j Fig. 6 is a perspective view of the longitudinalspring-pressed clamping member; Fig.` 7 is a side elevation of a modified form` of` holder` with a pyrometer therein;

fragmentary vertical section on and i Figs` 9 and 10 are detail longitudinaland cross.: sections, taken at the rear end of the The sensitive end of the pyrometer, designatedas a wholeby the reference numeral 1, is` of knowncharacter, consisting of a thermo-couple incased in suitable tubing be 'introduced into regions or comprises certain improveand eifective means 'forV lat an angle on dle and provided withan opening 14; in its interior of A slidableclamping piece 15 Patented Mar. 12, 1918.

. Application led August 11, 1915. Serial No. 44,881.

molten bodies of great heat to measure the temperature thereof. The thermo-couple is illustrated as of the rare metal type, but the invention is `also applicable to base metal couples. The members of the thermo-couple are designated 2 and 3, and are'insulated from each other in a suitable manner, as by a small tube 4 of insulating` material surrounding one of them. The hot junction 5 is at the bottom, as usual, and the cold junctions 6 and 7 atthe top, the latter constituting the `connections between the thermo-couple elements and the leadsS, 9,

extending to the -usual indicator (not` shown). Aswill be understood by those skilled Vin the art, the members of the thermo-couple being of diverse metals, heating of the hot junction while the remote junctions remain cool causes a current of electricity t-o flow, the strength of which is proportional to the temperature and causes the Y indicator (not shown) to register the proper reading.` In the particular type of pyrometer selected for illustration, the protective tubing comprises an outer tube 10 of graphite and an inner tube 11 of quartz, extending above the graphite tube, both tubes being closed at the bottom.

The present invention is .concerned more particularly, thoughnot` necessarily exclusively, with the use of such pyrometers for measuring the temperatures of molten bodies of metal in crucibles or the like, ,and the purpose is to provide the sensitive end with a Ysimple and reliable .holder which enables, the attendant to immerse and withdraw the thermo-couple with itsprotective` tubing` tally elongated hollow handle 12,'preferably and a tubular socketY 13 set he forward end of the hanof'metal tubing,

side communicating with the the handle. operates in thisopening and in the-forward part of thebore of the handle, which oocupies Vwith a sliding fit, and is secured to the forward `end of a rod 16 which extends lengthwisewithin the handle.V The clamp.- j

'I5 ff capl9 onthe Yrearenfd ofthe handle serves' to; easeol thel rodV underv the action ofj the ySprng ortowithdrawthe same against such f'."ofcrushing; V f Y 1 ,"M'e'an's are; ls'ojproyided on }'the handle forsupport'ngfthe leads 8 5 .9 out of the v` Way,' the said means preferably 'comprising f clips 2 5 projecting upward from thelhandle i' fi and e-vngeyee through which the zwreeere 40 f attachment-'ofkeel nature oa spring 17 fis' proyded for pro,-

V" ecting the Vvclamping 'piecel -intO the socket i and`f-againstthefsad tube, While a Wing '18, threaded on l the rearwardly-promoting.

f extremity off' the rod and bearing against actioi1L` The spring is housed Withijthe to 'escape'. the effects offthevheatfadbears atone end against-,the cap 19 fandat lthe'. -other endaga'insta Washer Q ()retained bya pin 21,'v vhi-c`zh1mayV be passed through fone o r."ailfotllef,offV a Vvseries of holes '22 inl the rod" provided for'zpurposes of fadju's'tment.-

screw 23 threaded into (the clamping 'p'ieo'e part: fof I the-thermO-eouple, fand eensistng VVV f preferably of; a hollow; piecei in' 'the'I-iatureV of a j returnbend, having Ilpplesv 2 7 *for the y u itableflexble eupplydnd' retdrfeehneetenl 28, leading enel suitable Sedree water feriply .end the other toafpoint' of disehargeor back totheA I dfjfthl.. luie in elderte. fXQthe, .water-jacket men the adj ustability: of thesaid member` '011 the tube. 11?, enabl'es'the Water-jacket to Vbe set at theproper height with 'reference to the cold I @junctions-and at the'same time-QbViatesfup-r Ward'- displacement of the thermo-couple and tube- 11 Withreference to theV outer tube l0.

Aable meuhting isf'proyide'd for the Water?k gfjaclget-member,which in conjunction With -Water enters through one 'offfthegconnections :28, circulates 'around the' upperfrpart 'of the thermo-couple 'and passes ayay by the 1 `,other 'jconn'ection,`- thus enablingqthe cold Yjunctions tofbe maintained at uniform" accuracy in" the readings;

111115,34 holdngthe; Weteriaeketfs 'also -lie-f e.' Upper 1 i irelatii'f'el5-z loWV 'temp'e'grature7 so'asto secure; L

'18a I Vprder't VVremove `the sensitiveend of v -drectenmerelyfe'ases-off the Vspring v'17, so 'that the; Clamping deviee is forced against the tubellOV on yby lthe expansivel pressureofV the !`s'prir 1 g, *15 and operatilig'in a slot'24 in the 'handle l seryesftokeep;thefclampingpiece from'turne' '30 Y inou-ri id clam". forfy rip 'ind vtheV "b re'iakV Table; ftlie .of thepthermogfcouylewhich vvholdS V" the tju` b'e with certainty'yetwithout danger afnd consequently' dangerfof j Y the" tube-,19de teken: out, 1` the Weter-jeeke pgrfing# @beamer mbe 11j-fand theetummeff;

Y';lege. 71nelleillustrate;fm alternativefoem' handle areas beforerwandfare' designated 'by The .portion i elemeetslllzand-fleexis omparatively eher@ dedie-ended YWihdllje verteelfhendle member 12"5 .which Y'inturn is connected-With af f Y horiz ontal handle member-112; Theserfstive Y end of the pyrometerfis shown` as proyided these/binding posts, land the flatter pare led" Preeeedftegether by e Set ef fer theeeneitiveeid feiereemprlene? en .elengetedf LhelIeW A hguiellfe Yterminating 1n a 'tubularlsocketfset Vati-.370 Y an angle thereto, an element disposed lonnally within the handle member, a clamping gitudinally within said handle and terminat- `piece on the lforward end of said rod Opera- .ing a clamp portion adapted to .project tive through said opening and having a V- into-said socket, a spring Jfor urging sai shaped extremity, a spring inside the handle "5. element toward the socket, and means at the member arranged to urge said rod forward, A0

f rear end of said` element for permitting the and an operating nut threaded on the prosame to be projected by the action of the jeoting lrearend of said rod and bearing spring and `Jrior withdrawing the element against the handle.

' l against the spring action. In testimony whereof I have signed my 1o 2. A holder for the sensitive end of a pyname in the presence of two subscribing wit- 25 f rometer, comprising a hollow handle memvnesses.

\ y ber, a tubular socket on the forward end of GEORGE DAVEY.` the handlemember having an opening in its Witnesses:

C side communicating with the interior of the Y HCYHAS. H. Wmsny,

is handle member, aV rod extending longitudi- S. SPENCER BROWN. fr sfr i n, Copies of this patent may be obtained for ve cents each, by addressing the "commissioner e! Intente,

Washington, D. C. 

